Patent US2656885A successfully refreshed from Google Patents.
US2656885A
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Concentrating apparatus
Assignee: ZAREMBA CO
•
Filing: 1949-02-16
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Granted: 1953-10-27
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Expires: 1969-02-16
Abstract
No abstract record available.
Inventors
- 👤 Burton S Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:01
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/22; B01D1/222; B01D1/228; A; A23; A23L; A23L2/00; A23L2/02; A23L2/08; A23L2/10; Y; Y10; Y10S; Y10S159/00; Y10S159/41
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189402498A
Cited
US942407A
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US1164413A
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US1415255A
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US1355702A
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US1576838A
Cited
US1580164A
Cited
US1730902A
Cited
US1854619A
Cited
US2032785A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |